Mishimoto MMTS-WRA-12V2 Thermostat with Housing for 2012-18 Jeep Wrangler JK 3.6

Vehicle Fitment

• 2012-2018 Jeep Wrangler JK (3.6 L Pentastar V6) - direct-fit application.
• Fitment confirmed through 2018; coverage for 2019+ or other engines not verified at time of listing.

Features

• Thermostat opens at 180 °F (82 °C) to allow coolant flow earlier than the factory ~203 °F setting.
• Upgraded aluminium thermostat housing improves durability over the original plastic unit.
• Integrated bleeder screw simplifies cooling system air removal after service.
• Premium wax-based thermostat valve for stable and repeatable operation across thermal cycles.
• Lower engine coolant temperatures help reduce thermal load and support frequent towing or high-ambient usage.
• Direct-fit design uses OEM mounting points and hose connections - no major modification required.
• Ideal for off-road, heavy-load or hot-climate applications where cooling performance is critical.
• Backed by Mishimoto's lifetime limited warranty for quality assurance.

Specifications

• Part Number: MMTS-WRA-12V2
• Opening Temperature: 180 °F (≈ 82 °C)
• Material: Aluminium housing, premium thermostat element
• Compatibility: 3.6 L V6 Jeep Wrangler JK 2012-2018

Included Components

• 1x Thermostat housing assembly with integrated thermostat
• 1x Bleeder screw included
• 1x Gasket/seal kit

Product Description

The Mishimoto MMTS-WRA-12V2 Thermostat with Housing is designed for the Jeep Wrangler JK equipped with the 3.6 L Pentastar V6 engine, built between 2012 and 2018. By opening at 180 °F instead of the typical factory setting of around 203 °F, it allows coolant to circulate earlier - reducing overall engine temperature under demanding conditions such as heavy load, hot climates or continuous off-road use.

Constructed with a robust aluminium housing and factory-style fitment, this kit replaces the original housing with a more durable unit while retaining the stock mounting points and hose connections. The included bleeder screw makes service and installation cleaner and easier. Whether you're upgrading for reliability or performance, this thermostat kit offers almost plug-and-play installation.

Before you purchase, please verify your vehicle is a 2012-2018 Jeep Wrangler JK with the 3.6 L V6 engine. While coverage through 2018 is verified, fitment for later model years, other engines or non-standard cooling setups is unconfirmed at this time.